Improvement in cutter-heads



M. BUCK.

CUTTER-HEADS.

Patented July 25.1876.

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N-PETERS, PHOTO-LITHOGRAPNER. WASHINGTON D C ascertained.

UNITED STATES P TENT OFFICE MARTIN BUCIQOF LEBANON, NEW HAMPSHIRE.

IMPROVEMENT lN CUTTER-HEADS.

Specification forming part of Letters Patent No.180,320, dated July 25,1876; application filed July 19, 1876.

To all whom it may concern.

Be it known that I, MARTIN BUCK, of Leb anon, in the county of Graftonand Stateot' New Hampshire, have invented certain Improvements inOutterI-Ieads, of which the following is a specification: i

My invention relates to cutter-heads of machines forcutting grooves,slots, or mortises, and it consists in a novel construction,combination. and arrangement of parts, the object of which is to renderthe cutter-head through the hub of one part of the cutterhead, andentering a suitable hole or nut tapped in the other. The said screw isvheld fast by a set-screw when the desired distance between the two partsof the cutter -'head is All of the parts of the cutterhead do not needdescription here, as they are mainly the same as shown in Letters Patentgranted to me April 27, 1875, No. 162,526.

A represents the rear part of the cutterhead. B represents the frontpart. 0 is the hub of the front part B, The rear portion has a centraltubular-shaped projection, e, which entersa correspondingly-shapedrecess,

f, in the front part B of the outter-head,-thus allowing the two partsto slide to or from each other. In the hub of the front part 1) isformed a hole, 0, for the passage of the longitudinal screw to, saidscrew passing entirely through the hub of the front part of the outter-head and'entering a hole or nut tapped in the rear part A. In thehub of part B there is placed a setscrew, b, at right angles to thelongitudinal screw a, for the purpose of holding the latter fast inplace when the desired adjustment is made.

It is seen from the foregoing that the two portions of the cutter-headmay be moved to or from each other and held fastat the wishedfor placeof adjustment bymeans of the longitudinal screw to and the set-screw b.-

l have shown the screw to as entering the hub of the front part B ofthecutter head, but the said screw may be inserted in the rear part A withthe same results, as will be seen from an inspection of the model.

I claim as my inventionv 1. The combination of the two parts A and and Bwith the longitudinally-moving adjusting-screw a, substantially as andfor the purpose specified.-

2. The combination of thepart A, having the tubular spindle c, with thepart B, having the hub G, the adjusting-screw a, and the setting devicefor the screw a, substantially as and for the purpose specified.

MARTIN BUCK. Witnesses:

M. M. LIsooMB, O. H. GLOUGH.

